Effects of moisture and sorption on bioavailability of p-hydroxybenzoic acid to Arthrobacter sp. in soil

Johnson, Teresa A.; Sims, Gerald K.; Ellsworth, T. R.; Ballance, A.R.

doi:10.1016/s0944-5013(99)80049-4

Cited by 15 publications

(11 citation statements)

References 12 publications

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“…The biologically effective dose for DKN (for the four species that were effectively controlled) is thus probably less than the solution concentrations predicted herein. Nonetheless, the findings support the hypothesis that degradation and sorption control herbicide effectiveness, and they are consistent with the patterns of IFT performance in the field that were described by Williams et al 14 The present experiments were performed using controlled moisture regimes, but it is important to note that availability of organic compounds to microorganisms can decrease significantly with soil drying as water films become more discontinuous, resulting in a portion of the soil pore space becoming inaccessible 17. Moreover, IFT fate changes more profoundly with water content than for most herbicides, with resurgence of activity reported for subsequent rainfall events 18.…”

Section: Discussionsupporting

confidence: 91%

Role of sorption and degradation in the herbicidal function of isoxaflutole

Sims¹,

Lovell²,

Tarr³

et al. 2009

Pest Management Science

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Section: Discussionsupporting

confidence: 91%

Role of sorption and degradation in the herbicidal function of isoxaflutole

Sims¹,

Lovell²,

Tarr³

et al. 2009

Pest Management Science

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“…Including an indicator of the accessibility of the soluble substrate pool (e.g. residual substrate persisting in soil solution) may assist in interpreting results since a significant fraction of treated pore space may not be inhabited by degraders (Gonod et al 2003;Johnson et al 1998). After application, further distribution of the added material over time will depend on factors such as retention by sorption to solids and the portion of pore space filled with water (which defines cross sectional area available for diffusion).…”

Section: Resultsmentioning

confidence: 99%

Introduction of 2,4-dichlorophenoxyacetic acid into soil with solvents and resulting implications for bioavailability to microorganisms

Johnson

Sims

2010

World J Microbiol Biotechnol

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Slow equilibration of introduced chemicals through tortuous pore space limits uniform substrate distribution in soil biodegradation studies. The necessity of introducing poorly soluble xenobiotics via organic solvents, the volume of which is minimized to limit toxicity, likely also affects xenobiotic distribution. Our objective was to investigate relative effects of carrier solvent choice and volume on xenobiotic distribution, apparent solvent toxicity, and soil degradation of 2,4-dichlorophenoxy acetic acid. Incubations using four carrier solvents ranging in properties showed that the fraction of 2,4-D mineralized was a hyperbolic function of solvent volume used (0.02-10 ll g -1 ), attributed to compensating effects of herbicide bioavailability and solvent toxicity. Substrate concentration influenced mineralization of herbicide introduced with organic carriers, but not water. Fraction of material readily desorbed increased when water was the carrier. Results suggest that solvent toxicity should be balanced with uniformity of substrate distribution when using organic carriers in soils. Substrate bioavailability is a ubiquitous issue in terrestrial microbiology research, thus limitations observed herein broadly apply to microbiology questions about introduced substances in soil. We advocate the development of tools to characterize variable conditions among soil compartments, estimates of substrate bioavailability, and linkage of this information to microbial data.

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“…This consequently results in a decreased biodegradation rate (Johnson et al 1999;Atlas 1981). Additionally, when pore water freezes, its dissolved salts are expelled to the unfrozen waters, resulting in more concentrated solutions with salinity levels beyond the optimum range.…”

Section: Soil Humiditymentioning

confidence: 99%

Bioremediation treatment of hydrocarbon-contaminated Arctic soils: influencing parameters

Naseri

Barabadi

Barabady

2014

Environ Sci Pollut Res

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The Arctic environment is very vulnerable and sensitive to hydrocarbon pollutants. Soil bioremediation is attracting interest as a promising and cost-effective clean-up and soil decontamination technology in the Arctic regions. However, remoteness, lack of appropriate infrastructure, the harsh climatic conditions in the Arctic and some physical and chemical properties of Arctic soils may reduce the performance and limit the application of this technology. Therefore, understanding the weaknesses and bottlenecks in the treatment plans, identifying their associated hazards, and providing precautionary measures are essential to improve the overall efficiency and performance of a bioremediation strategy. The aim of this paper is to review the bioremediation techniques and strategies using microorganisms for treatment of hydrocarbon-contaminated Arctic soils. It takes account of Arctic operational conditions and discusses the factors influencing the performance of a bioremediation treatment plan. Preliminary hazard analysis is used as a technique to identify and assess the hazards that threaten the reliability and maintainability of a bioremediation treatment technology. Some key parameters with regard to the feasibility of the suggested preventive/corrective measures are described as well.

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Effects of moisture and sorption on bioavailability of p-hydroxybenzoic acid to Arthrobacter sp. in soil

Cited by 15 publications

References 12 publications

Role of sorption and degradation in the herbicidal function of isoxaflutole

Role of sorption and degradation in the herbicidal function of isoxaflutole

Introduction of 2,4-dichlorophenoxyacetic acid into soil with solvents and resulting implications for bioavailability to microorganisms

Bioremediation treatment of hydrocarbon-contaminated Arctic soils: influencing parameters

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